| Year | Count |
|---|---|
| 1989 | 16 |
| 1990 | 25 |
| 1990 | 6 |
| 1991 | 49 |
| 1992 | 19 |
| 1992 | 5 |
| 1993 | 47 |
| 1994 | 45 |
| 1995 | 75 |
| 1995 | 11 |
| 1996 | 65 |
| 1997 | 74 |
| 1997 | 12 |
| 1998 | 80 |
| 1998 | 22 |
| 1999 | 22 |
| 1999 | 17 |
| 2000 | 49 |
| 2000 | 25 |
| 2001 | 29 |
| 2001 | 20 |
| 2002 | 49 |
| 2002 | 44 |
| 2003 | 24 |
| 2003 | 20 |
| 2004 | 47 |
| 2004 | 13 |
| 2005 | 20 |
| 2005 | 53 |
| 2006 | 10 |
| 2006 | 34 |
| 2007 | 618 |
| 2007 | 80 |
| 2008 | 553 |
| 2008 | 190 |
| 2009 | 304 |
| 2009 | 123 |
| 2010 | 184 |
| 2010 | 49 |
| 2011 | 194 |
| 2011 | 74 |
| 2012 | 154 |
| 2012 | 47 |
| 2013 | 100 |
| 2013 | 38 |
| 2014 | 74 |
| 2014 | 57 |
| 2015 | 122 |
| 2015 | 20 |
| 2016 | 40 |
| 2016 | 22 |
| 2017 | 21 |
| 2017 | 6 |
| 2018 | 5 |
| 2018 | 5 |
| 2020 | 8 |
| 2021 | 5 |
| 2022 | 10 |
| 2023 | 6 |
| 2024 | 6 |